Photoluminescence studies of type-II diluted magnetic semiconductor ZnMnTe∕ZnSe quantum dots

2006 ◽  
Vol 89 (26) ◽  
pp. 263111 ◽  
Author(s):  
M. C. Kuo ◽  
J. S. Hsu ◽  
J. L. Shen ◽  
K. C. Chiu ◽  
W. C. Fan ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Type Ii ◽  
Diluted Magnetic ◽  
Photoluminescence Studies

scholarly journals InGaAs Quantum Dots on Cross-Hatch Patterns as a Host for Diluted Magnetic Semiconductor Medium

2013 ◽  
Vol 2013 ◽  
pp. 1-5
Author(s):  
Teeravat Limwongse ◽  
Supachok Thainoi ◽  
Somsak Panyakeow ◽  
Songphol Kanjanachuchai
Keyword(s):  
Quantum Dots ◽  
Molecular Beam ◽  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Magnetic Medium ◽  
Magnetic Region ◽  
Diluted Magnetic ◽  
Mismatched Heteroepitaxy ◽  
Quantum Dimensions ◽  
Magnetic Quantum Dots

Storage density on magnetic medium is increasing at an exponential rate. The magnetic region that stores one bit of information is correspondingly decreasing in size and will ultimately reach quantum dimensions. Magnetic quantum dots (QDs) can be grown using semiconductor as a host and magnetic constituents added to give them magnetic properties. Our results show how molecular beam epitaxy and, particularly, lattice-mismatched heteroepitaxy can be used to form laterally aligned, high-density semiconducting host in a single growth run without any use of lithography or etching. Representative results of how semiconductor QD hosts arrange themselves on various stripes and cross-hatch patterns are reported.

Raman Spectroscopy of A Novel Diluted Magnetic Semiconductor: Cubic Cd1−xMnxSe.

1989 ◽  
Vol 161 ◽  
Author(s):  
R. G. Alonso ◽  
E.-K. Suh ◽  
H. Pascher ◽  
E. Oh ◽  
A. K. Ramdas ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Zinc Blende ◽  
Spin Flip ◽  
Mode Behavior ◽  
Diluted Magnetic ◽  
Photoluminescence Studies ◽  
Bound Electrons ◽  
Interaction Characteristic

ABSTRACTIn contrast to the bulk diluted magnetic semiconductor (DMS) Cd1−xMnxSe which occurs with the wurtzite structure, its epilayers grown on (001) GaAs substrate by Molecular Beam Epitaxy exhibit the cubic zinc-blende structure. Raman spectroscopy and photoluminescence studies on this novel DMS show (1) a “two-mode” behavior of the zone center optical phonons, (2) the Raman line associated with the spin-flip in the Zeeman split S = 5/2 ground state of Mn2+, and (3) large Raman shifts associated with the spin-flip of donor-bound electrons. The large magnetic field dependence in (3) with saturation at high fields and low temperature shows that the s-d exchange interaction characteristic of DMS's is also manifested strikingly in the zinc-blende phase of Cd1−xMnxSe.

Dynamics of localized Mn spins in diluted-magnetic-semiconductor nanostructures with quantum dots

2004 ◽  
Vol 241 (2) ◽  
pp. 361-369 ◽  
Author(s):  
A. V. Scherbakov ◽  
A. V. Akimov ◽  
D. R. Yakovlev ◽  
W. Ossau ◽  
L. W. Molenkamp ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Semiconductor Nanostructures ◽  
Diluted Magnetic
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